Edit:
Courts deal with contract law disputes all the time. It's their bread and butter, everyday, nothing special stuff.
Edit2:
To you below, citation needed
Edit: I'm somewhat mad that there's all these tools out there to solve the screeching about GPL violations and nobody seems to want to use them.
> The Copyright Claims Board (CCB) is available to resolve copyright disputes of a relatively low economic value and provides an efficient, less expensive alternative to federal court.
https://ccb.gov/
Basically everybody who knows enough to try, knows what the outcomes will tend to be.